Sample `.gitlab-ci.yml`: ``` variables: POETRY_VERSION: 1.1.11 TOX_VERSION: 3.24.4 stages: - lint - unit-test lint: stage: lint image: python:3.10 script: - pip install poetry==${POETRY_VERSION} tox==${TOX_VERSION} - tox -e lint tox: stage: unit-test image: python:${PYTHON_VERSION} parallel: matrix: - PYTHON_VERSION: ["3.8", "3.9", "3.10"] script: - pip install poetry==${POETRY_VERSION} tox==${TOX_VERSION} - tox -e py$(echo ${PYTHON_VERSION} | tr -d .) ``` Currently, this fails as the variable in the `image` field is not expanded: ``` gcil ===[ Jobs selector ]=== [tox] ===[ unit-test: tox (python:${PYTHON_VERSION}, docker) ]=== Traceback (most recent call last): File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/docker/api/client.py", line 268, in _raise_for_status response.raise_for_status() File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/requests/models.py", line 953, in raise_for_status raise HTTPError(http_error_msg, response=self) requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: http+docker://localhost/v1.41/images/python:%24%7BPYTHON_VERSION%7D/json During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/patrick/.local/bin/gcil", line 8, in <module> sys.exit(main()) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/gitlabci_local/cli/main.py", line 253, in main result = MenusFeature(jobs=jobs, options=options).select() File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/gitlabci_local/features/menus.py", line 153, in select result = PipelinesFeature(self.__jobs, self.__options).launch() File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/gitlabci_local/features/pipelines.py", line 75, in launch result = Jobs(options=self.__options).run(self.__jobs[job], result, File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/gitlabci_local/jobs/runner.py", line 473, in run result = self.__run_container( File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/gitlabci_local/jobs/runner.py", line 96, in __run_container self.__engine.get(image) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/gitlabci_local/engines/engine.py", line 116, in get self.__engine.get(image) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/gitlabci_local/engines/docker.py", line 107, in get self.__client.images.get(image) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/docker/models/images.py", line 314, in get return self.prepare_model(self.client.api.inspect_image(name)) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/docker/utils/decorators.py", line 19, in wrapped return f(self, resource_id, *args, **kwargs) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/docker/api/image.py", line 251, in inspect_image return self._result( File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/docker/api/client.py", line 274, in _result self._raise_for_status(response) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/docker/api/client.py", line 270, in _raise_for_status raise create_api_error_from_http_exception(e) File "/home/patrick/.local/pipx/venvs/gitlabci-local/lib/python3.9/site-packages/docker/errors.py", line 31, in create_api_error_from_http_exception raise cls(e, response=response, explanation=explanation) docker.errors.APIError: 400 Client Error for http+docker://localhost/v1.41/images/python:%24%7BPYTHON_VERSION%7D/json: Bad Request ("no such image: python:${PYTHON_VERSION}: invalid reference format") ```